"No longer will we have gay marriage and straight marriage, we'll only have marriage," said Mayor Rahm Emanuel.

The ruling comes nearly two years after then Governor Pat Quinn made same-sex marriage legal in Illinois.

"I said then, love is patient, love is kind, love never fails and the Supreme Court this week made sure that's the law of the land in America and it's truly a special day for everybody in our country," said Quinn.

Parade organizers asked crowds to behave after the city threatened to move the event out of the Lakeview neighborhood. This year, along with hundreds of Chicago police officers, 90 off-duty police officers were hired for extra security.

"We want people to come, have a safe and happy day, and we wish everybody happy pride," said Richard Pfeiffer, PRIDEChicago.

"We have to party responsibly. It means no public drinking, a $1,000 fine, so please keep this very responsible," said Alderman James Cappleman, 46th Ward.

Three same-sex couples were married and country recording artist Ty Herndon was grand marshal of the parade that featured the Stanley Cup, hundreds of marchers, entertainers, and groups including the ABC7 Eyewitness News float.

While most celebrated a victory for equality, others say there's still more work to be done.